Another thing it's good for is rekindling my love for something I started and abandoned. I use Evernote to write out scenes or jot down a direction I want a story to go.
A lot of times, I forget things I write down. I've always thought that because I keep a journal, my brain is freed up for new information. Or that's just a really good excuse to be forgetful. How am I supposed to remember how much my kids weighed when they were born? That's why they have baby books. I wrote it down so I would remember it.
Maybe that's why I write anything I write. I don't care if I ever get published, even though it would be nice. I just want to be able to remember the story I had to tell.